Mercuric amidochloride is an inorganic compound with the formula HgNH2Cl. It consists of a zig-zag 1-dimensional polymer (HgNH2)n with chloride
counterions. It arises from the reaction of ammonia and mercuric chloride. Addition of base converts it into "Millon's base," which has the formula
[Hg2N]OH(H2O)x. A variety of related amido and nitrido materials with chloride, bromide, and hydroxide are known.
At one time, before the toxicity of mercury was appreciated, this material was considered as antiseptic and disinfectant.http://en.wikipedia.org/wiki/Mercuric_amidochloride

Somebody know how we can make it?just adding ammonia to Mercury(II)Chloride?

I wonder then, why did you post this in the Organic chemistry section?!

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Somebody know how we can make it?just adding ammonia to Mercury(II)Chloride?

Did you bother checking the literature before asking here? Have you at least checked the reference wikipedia gives? I sure hope you did, because I can
think of no rational reason on why would you want to publicly demonstrate an unprecedented lazinesses of such kind.